/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hazelcast.internal.util;

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@FunctionalInterface
public interface NetworkInterfacesEnumerator {
    List<NetworkInterfaceInfo> getNetworkInterfaces() throws SocketException;

    static NetworkInterfacesEnumerator defaultEnumerator() {
        return new DefaultNetworkInterfacesEnumerator();
    }
}

class DefaultNetworkInterfacesEnumerator implements NetworkInterfacesEnumerator {

    @Override
    public List<NetworkInterfaceInfo> getNetworkInterfaces() throws SocketException {
        List<NetworkInterfaceInfo> infos = new ArrayList<>();
        for (NetworkInterface networkInterface : Collections.list(NetworkInterface.getNetworkInterfaces())) {
            NetworkInterfaceInfo networkInterfaceInfo = new NetworkInterfaceInfo(networkInterface);
            infos.add(networkInterfaceInfo);
        }
        return infos;
    }
}
